Xiaohong irons her school uniform at home with a household steam iron (see schematic diagram and nameplate). When in use, the water drops in the water tank fall into the hot air chamber of the bottom

Xiaohong irons her school uniform at home with a household steam iron (see schematic diagram and nameplate). When in use, the water drops in the water tank fall into the hot air chamber of the bottom plate and evaporate quickly. (1) Water vapor is a colorless and odorless gas, which is invisible to the naked eye. The "white gas" we see is small water droplets formed by the liquefaction of water vapor when it meets cold. ?

(2) Power consumption for ironing clothes 10min: w = Pt =1000 w×10× 60s20s×15s = 4.5×105j;

(3) Pressure on clothes: p = fs =1.3kg× 9.8n/kg+20n160x10? 4m2=2.05× 105Pa。

Answer: (1) The "white gas" you see is water droplets formed by the liquefaction of water vapor when it meets cold;

(2) She ironed clothes for 10 minute, and consumed 4.5× 105J of electricity.

(3) When ironing clothes with an iron, Xiaohong presses the iron with a downward force of 20N. In this process, the pressure on clothes is 2.05× 105Pa. Dad.